ranger file

uncountable

(military) Single file with a short distance between the soldiers.

Japanese Meaning

兵士たちが短い間隔を保ちながら縦一列に並んだ軍隊の隊形

The platoon advanced in a ranger file through the narrow canyon to avoid detection.

小隊は発見を避けるため、峡谷を狭い間隔で一列に並んで進んだ。

Sense（1）

(military) Single file with a short distance between the soldiers.